Open Box Darkglass Electronics Microtubes X 900 Bass Amplifier Head 900W

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From Darkglass:

Uncompromised precision. Designed after the revered X series pedals, the Microtubes X 900 sets a new standard for accuracy and control. We packed an all-analog preamp, a 900 watt Class D amplifier, and an ultra-quiet 6-band graphic equalizer inside to sculpt tones from crystal clear to aggressive and overdriven.

Front Panel Features

Input
Use this jack to connect your instrument via a standard ¼" mono cable.

Passive/Active
Use this push-button switch to change from passive to active mode. If your bass is active it can have a hotter signal, making the amp distort earlier.

X
Use this push-button to turn on or off the Microtubes X Engine which allows you to compress and distort your bass signal in two separate bands, solidifying the clean low end and distorting the highs to taste from articulate to aggressive. The Microtubes X Engine operates before the EQ section.

Clean Comp
Use this push-button switch to activate the compressor circuit for the clean channel.

Vol (Clean Comp)
Sets the level of the clean channel when the compressor is engaged.

HPF (High Pass Filter)
Controls the cutoff frequency of the high pass filter which is applied before the clean signal is fed to the distortion circuit. Ranging from 100 Hz to 1 kHz.

Drive
Sets the amount of distortion for the high pass side.

Mix
Controls the blend between the compressed lows and the distorted highs.

LPF (Low Pass Filter)
Controls the cut-off frequency of the low pass filter which is applied before the clean signal is fed to the compression circuit. Ranging from 50 Hz to 500 Hz.

Comp
Controls the amount of compression for the low band when X is activated. Both threshold and makeup gain are controlled to maintain a constant level.

Level
Sets the output volume of the X channel.

Bass
+-12 dB @ 80 Hz.

Mids
+-12 dB at 250, 500, 1.5k and 3 kHz.

Treble
+-12 dB @ 3 kHz.

Master
Sets the overall volume of the unit.

Mute
Use this push-button to mute the amplifier.

Dimensions
Width: 26.7 cm / 10½"
Length: 25.5 cm / 10"
Height: 7.1 cm / 2¾"
Weight: 2.4 kg / 5.3 lb

Back Panel Features

Speaker Output
Use this connector to connect the amplifier to your cabinet. This speakON combo jack allows for either speakON or ¼" speaker cable operation. The outputs are connected in parallel with the minimum load of 2.5 Ω.
WARNING: Do not use an instrument cable with this jack.

Send
Use this output to send the signal to effects units.

Return
Use this input to receive the signal from effects units.

Ground Lift
Use this control to lift the ground of the DI XLR outputs.

Pre DI Output
Use this connector to send a balanced copy of your clean signal to the console, mic preamp, interface, etc.

Post DI Output
Use this connector to connect the Microtubes X 900 preamplifier to balanced equipment via a standard XLR connector.

USB
The USB-C connector allows you to use the Darkglass Suite to load different cabinet impulses or change different parameters on your amp.

Headphone Output
Connect your headphones and enjoy the processed signal chain with the impulse response cabinet emulation.

Aux In
Connect this to the headphone output of your laptop, cellphone, MP3 player, etc.

MIDI
The MIDI input allows you to control the channels of the amp via a MIDI standard controller.

Footswitch
The Intelligent Footswitch is a proprietary digitally controlled device that allows you to remotely engage and disengage the X Engine or to mute the amplifier.

Fan
The fan forces air inside the amp to help the heatsink system cool the amp.

AC Socket
The X 900 has an automatically switching power supply that supports 100-240 VAC at 50/60 Hz.